Off-diagonal terms in Yukawa textures of the Type-III 2-Higgs doublet model and light charged Higgs boson phenomenology

Off-diagonal terms in Yukawa textures of the Type-III 2-Higgs doublet model and light charged Higgs boson phenomenology

We discuss flavor-violating constraints and consequently possible charged Higgs boson phenomenology emerging from a four-zero Yukawa texture embedded within the Type-III 2-Higgs Doublet Model (2HDM-III). Firstly, we show in detail how we can obtain several kinds of 2HDMs when some parameters in the Yukawa texture are absent. Secondly, we present a comprehensive study of the main B-physics constraints on such parameters induced by flavor-changing processes, in particular on the off-diagonal terms of such a texture: i.e., from $\mu -e$ universality in $\tau$ decays, several leptonic B-decays ($B \to \tau \nu$, $D \to \mu \nu$ and $D_s \to {l} \nu$), the semi-leptonic transition $B\to D \tau \nu$, plus $B \to X_s \gamma$, including $B^0-\bar B^0$ mixing, $B_s \to \mu^+ \mu^-$ and the radiative decay $Z\to b \bar{b}$. Thirdly, having selected the surviving 2HDM-III parameter space, we show that the $H^- c \bar{b}$ coupling can be very large over sizable expanses of it, in fact, a very different situation with respect to 2HDMs with a flavor discrete symmetry (i.e., ${\mathcal{Z}}_2$) and very similar to the case of the Aligned-2HDM (A2HDM) as well as of models with three or more Higgs doublets. Fourthly, we study in detail the ensuing $H^\pm$ phenomenology at the Large Hadron Collider (LHC), chiefly the $c\bar b \to H^+$ production mode and the $H^+\to c\bar b$ decay channel while assuming $\tau^+\nu_\tau$ decays in the former and $t\to bH^+$ production in the latter, showing that significant scope exists in both cases.

hep-ph

Hernández-Sánchez, J.

949d6d0b-c5e3-4fae-a99c-818b6da1361b

Moretti, S.

b57cf0f0-4bc3-4e02-96e3-071255366614

Noriega-Papaqui, R.

45b4385e-1018-4431-8fd2-4f1bffbc70bd

Rosado, A.

72e02cc9-ced1-4662-b23d-902e987f26aa

8 July 2013

Hernández-Sánchez, J.

949d6d0b-c5e3-4fae-a99c-818b6da1361b

Moretti, S.

b57cf0f0-4bc3-4e02-96e3-071255366614

Noriega-Papaqui, R.

45b4385e-1018-4431-8fd2-4f1bffbc70bd

Rosado, A.

72e02cc9-ced1-4662-b23d-902e987f26aa

Hernández-Sánchez, J., Moretti, S., Noriega-Papaqui, R. and Rosado, A.
(2013)
Off-diagonal terms in Yukawa textures of the Type-III 2-Higgs doublet model and light charged Higgs boson phenomenology.
*Journal of High Energy Physics*, 2013 (07), [44].
(doi:10.1007/JHEP07(2013)044).

## Abstract

We discuss flavor-violating constraints and consequently possible charged Higgs boson phenomenology emerging from a four-zero Yukawa texture embedded within the Type-III 2-Higgs Doublet Model (2HDM-III). Firstly, we show in detail how we can obtain several kinds of 2HDMs when some parameters in the Yukawa texture are absent. Secondly, we present a comprehensive study of the main B-physics constraints on such parameters induced by flavor-changing processes, in particular on the off-diagonal terms of such a texture: i.e., from $\mu -e$ universality in $\tau$ decays, several leptonic B-decays ($B \to \tau \nu$, $D \to \mu \nu$ and $D_s \to {l} \nu$), the semi-leptonic transition $B\to D \tau \nu$, plus $B \to X_s \gamma$, including $B^0-\bar B^0$ mixing, $B_s \to \mu^+ \mu^-$ and the radiative decay $Z\to b \bar{b}$. Thirdly, having selected the surviving 2HDM-III parameter space, we show that the $H^- c \bar{b}$ coupling can be very large over sizable expanses of it, in fact, a very different situation with respect to 2HDMs with a flavor discrete symmetry (i.e., ${\mathcal{Z}}_2$) and very similar to the case of the Aligned-2HDM (A2HDM) as well as of models with three or more Higgs doublets. Fourthly, we study in detail the ensuing $H^\pm$ phenomenology at the Large Hadron Collider (LHC), chiefly the $c\bar b \to H^+$ production mode and the $H^+\to c\bar b$ decay channel while assuming $\tau^+\nu_\tau$ decays in the former and $t\to bH^+$ production in the latter, showing that significant scope exists in both cases.

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## More information

Published date: 8 July 2013

Additional Information:
50 pages, 22 figures; version accepted by JHEP. arXiv admin note: text overlap with arXiv:1203.5769; and text overlap with arXiv:0906.5139, arXiv:1006.0470, arXiv:hep-ph/0309103 by other authors. text overlap with arXiv:1006.0470, arXiv:0906.5139 by other authors

Keywords:
hep-ph

Organisations:
Theory Group

## Identifiers

Local EPrints ID: 356666

URI: http://eprints.soton.ac.uk/id/eprint/356666

PURE UUID: bcf19638-aeb5-4c54-b47d-ad987fc9d7a1

## Catalogue record

Date deposited: 23 Sep 2013 13:16

Last modified: 15 Mar 2024 03:17

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## Contributors

Author:
J. Hernández-Sánchez

Author:
R. Noriega-Papaqui

Author:
A. Rosado

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